Bain Capital Fund IX LP is a limited partnership based in the Cayman Islands. As of 2009, it held $4.5 billion in assets and reported a $986 million increase in capital for the year.
In 2011, the Ann D. Romney Blind Trust held between $500,000 and $1 million in the fund, from which it earned between $200 and $1,000, according to financial disclosures. In 2006, the Ann Romney Trust held between $15,000 and $50,000 in the fund, earning between $200 and $1,000. The 2010 returns of both the Ann and Mitt Romney 1995 Family Trust and the Ann D. Romney Blind Trust report income from the fund's general partner, Bain Capital Partners IX LP. (Unofficial mirror of http://www.documentcloud.org/documents/407723-bain-capital-fund-ix-lp-financial-statements-dec.html)